Cosmetic brush



FIG. 1 is a left side elevation view of my new design for cosmetic brush.

FIG. 2 is a top plan view of FIG. 1.

FIG. 3 is a right side elevation view of FIG. 1.

FIG. 4 is a bottom plan view of FIG. 1.

FIG. 5 is a front side elevation view of FIG. 1.

FIG. 6 is a back side elevation view of FIG. 1; and,

FIG. 7 bottom side perspective of FIG. 1.

The features shown in broken lines in the drawing depict environmental subject matter only and form on part of the claimed design. 

CLAIM The ornamental design for a cosmetic brush, as shown and described. 